Input and Output Impedance (Circuits for Beginners #33)

This video series introduces basic DC circuit design and analysis methods, related tools and equipment, and is appropriate for first year university undergraduate students.

Aaron Danner is a professor in the Department of Electrical and Computer Engineering at the National University of Singapore.

Video filmed and edited by Cheryl Lim.
@randomcheryl

[Zuwwar]

Couldn't find such a nice explanation of this concept anywhere else on Internet. Thanks.

[MimirYgg]

im so dumb when it comes to electronics, i've been trying to understand impedance for a long time, finally i found a decent explanation, this channel looks promising

[mariofilippi]

Thank you Professor, your video clealy described the subject of impedence. I'm 72 and finally understand how to use this knowledge when using o'scopes and signal generators.

[AxelSyranoPedemeKuenzob]

It finally clicked. I now know the use of Norton and thevenin equivalent circuit design/schematics. It only took me studying MOSFETs to really try and understand it. Thanks Sir

[matrixate]

This was one of the best presentations I've seen. It squares up nicely to my university level Basic Electronics class.

[connorsmith]

Very well done. Simple, but actually explained, unlike in my text book.

[MustafaAhmed-zfcz]

Very simple and swift explanation exactly as promised in the title... Please keep it up!

[comeflywithme]

Great educational video. Keep up the good work!

[The_Aleph_Null]

i wish some video explained the process of calculating it tho. im still confused as to when do you turn off sources, and reactive elements to calculate input and output impedance. and if thats the case, the how could ever an input or output impedance have complex numbers if the reactive elements arent on when making an analysis to calc impedence. also, is making the separate ac and dc analysis give different in out impedances? also same question for low and high frequencies, are there just like 8 different combinations of things happening on a single circuit just to get z_in and z_out?

[佳期又误]

On page 36 of the book "The Art of Electronics 3rd Edition", Figure 1.72 shows a simple diode voltage clamp which looks cool, so I gave it a try. I set the cathode of the diode to a commercial DC voltage supply, set its output to 0v. Signal is connected to my signal generator, it generates a sine wave at 5v / -5v peak. In my imagination, the diode anode should be around 0.7v peak. To my surprise, no, no, the output waveform showing on oscilloscope show the output being clamped, but not at 0.7v, it was as high as 1.85v... What's going on? The voltage output showing on power supply panel is 0v, but the actual value is 1.85v. Obviously, this voltage source is far away from an ideal voltage source, it has a big internal impedence. By inserting an op amp voltage follower between the voltage supply output and the diode cathode, the problem went away. Now, the output wave has 0.7v peak value.

[matthewhauser-px]

Please explain why the input impedance is not the total impedance of the circuit

[mauricedemel]

Dear Sir, how can we findout (with mathamatics) I/P and O/P impedances in a two stage tube PRE AMPLIFIER (CASCADE wih and without -ve feed back).Please explain it with using equivalent circuits (Drawings) and Mathamatics.(Sorry for my bad english).I need step by step explanation. THANK YOU.

[samwanordinary]

what is max power transfer? and efficiebcy

[debojitacharjee]

*WHY HIGHER LOAD RESITANCE SPEAKERS CONSUME MORE POWER*---I have seen speakers with higher impedance like subwoofers are of high resistance value 8 ohms but normal speakers are of 4 ohms. But then why subwoofers are of higher wattage than 4 ohms speakers? When lower resistance load is connected to a power source, more current should pass.

[gurveersandhu]

bruh im just trying to learn about headphones and i somehow got here